Fixing small group of rotated images with MTP

PIX4Dmapper
1

Hello All,

I am currently working on creating a long roadway scan (about 1400 images and 4 miles long). The scan consists of several flights taken on the inside and outside of a roadway are mostly all top down photos.

after running step 1 I noticed there are a few small areas where clusters of images appear rotated and cause the tie points associated with those images to be skewed.

I have tried fixing this error by adding some manual tie points and reoptimizing but I have had little success with this process. Should I just keep adding more MTP’s or am I missing something bigger here?

Thank you in advance for any help the photos below show what I am talking about.

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{40F62289-A6A1-416F-87F3-C6FB298DD556}847×518 146 KB

2

Hello,

Can you attach your PDF quality report to this posting? We’ll take a look to see if there are any processing options that could improve the reconstruction.

3

Report for Pix4d Forum.pdf (111.7 KB)

I have attached the report here, thanks for the help! Please note the extreme errors on a few of the GCPs is resulting from the rotated imagery and I don’t believe it was the cause of these errors.

Another note is that this project consists of 5-10 flights at slightly different elevations so i think the model has problems at some of those seams despite how many MTPs I have added.

Thank you in advance for any help!

4

Thanks for sending the report. I looked at the processing options and I think we need to take a step backward. Can you reprocess but use the 3D maps template? This will reset all of your processing settings to something that is more in line with your project. If you still have some issues, please attach your updated quality report.

6

I started with that and basically if I left the matching on standard the entire model became a warped mess that barrel rolled and twisted on itself. The results I got with the last report I sent are the closest I have been able to get so far. I will re run so I can show you what I am talking about though.

7

Report for Pix4d Forum 3d map.pdf (591.0 KB)

Here is the result from the 3d Map settings. As you can see the calibration and matches are good but the overall shape of the model is crazy and doesn’t follow the shape of the roadway at all.

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{65FCFFA7-D34F-4761-AEDD-0328304835A0}1375×1012 152 KB

8

Yeah, that is an interesting calibration. Can you change the calibration method to Accurate Geolocation and Orientation? This should hopefully straighten it out.

9

Hello,

Thanks for the response. Unfortunately it isn’t letting me select that option. I am guessing it is because I don’t have a specified omega, phi and kappa angles for my images? (this area appears blank in the image properties tab)

Please let me know the best way to proceed here.

Thank you,

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{8B9D9154-04C1-429C-85B2-D83CCDAA8583}1605×1468 125 KB

10

It is likely that you do not have any orientation values in the images. In that case, can you try processing with the Alternative calibration method?

11

That is what I was doing when I posted my original question.

Do you have any other tips?

Thank you

12

The problem is that you have an older version of Mapper. The latest version (4.10.0) provides full support for the Skydio X10. This means that Mapper will correctly read the orientation values for this drone. If your support and upgrades have expired, you will need to renew them so that you can download and install this version.

1 Like
13

I updated my version and am still seeing this error. Do I have to reupload and create new projects?

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{98817E2B-18D1-4C95-B780-E75789B412B8}1721×1566 146 KB

14

Try a new project to see if the orientation values are correctly read. Otherwise, Skydio used to export an additional .csv file on the SD card that contained these values. I believe it was called PIX4Dmapper_geolocation or something very similar. Please check to see if this file is on the SD card.

1 Like
15

Okay, I believe that table is only exported if the scan was completed using the map capture mode. If a user instead manually takes photos there is no log recorded.

I will try and reupload some of the photos and see what it is able to show.

Thanks

16

I had to start a new project once I updated pix4d but the accurate geolocation settings fixed the issue. Thank you!